Question

ПОМОГИТЕ СРОЧНО!!!!!!!!!!!!!!!!!!!!!!!!
решите примеры:
-1/17*3,4-(4/9+1)
............................
5(х-2)-(х-1)=9

Answer 1

5(x-2)-(x-1)=9
5x-10-x+1=9
4x=9-1+10
4x=18
x=4.5